A Stevenson High School student sent out a message on Twitter that put the Skamania County, Wash. school in lockdown and sent the student to jail Monday, officials said.

Undersheriff Dave Cox of the Skamania County Sheriff’s Office, said Austin Raphael, 18, was arrested after he sent a tweet out shortly after school began that included the words “gunmen at school!!!”

Cox said school officials immediately went into their lockdown procedures and deputies were dispatched to the school.

Raphael, from North Bonneville, was booked into the Skamania County Jail on accusations of felony harassment.

“We were very fortunate today”, said chief criminal Deputy Pat Bond. “The cooperation between the Stevenson-Carson School District and the sheriff’s office provided a swift and timely response, resulting in a very quick resolution to the situation.”